National 710574 Wheel Seal - Rear Outer

Overview of National 710574 Wheel Seal for Toyota Vehicles

The National 710574 wheel seal is engineered to provide reliable sealing performance for select Toyota models including the 4Runner, T100, Tacoma, and Tundra. Designed with a bi-directional lip and constructed from durable nitrile material, this oil seal helps maintain driveline integrity by preventing lubricant leaks and contamination.

• Inside diameter options: 2.126 inches (54 mm) shaft size
• Outside diameter: 2.530 inches (64.25 mm)
• Overall width with side lip: 0.945 inches (24 mm)
• Bi-directional helix lip design for effective sealing
• Material: Nitrile for resistance to oil and wear
• Compatible with Toyota 4Runner, T100, Tacoma, and Tundra models
• Part number: 710574, Series 710500

Technical Details and Specifications

This National wheel seal features a 2.126 inch (54 mm) inside diameter designed to fit shafts of the same size, ensuring a precise fit for the axle assembly. The outside diameter measures 2.530 inches (64.25 mm), matching the housing bore dimensions of approximately 2.520 inches (64 mm). The seal’s overall width, including the side lip, is 0.945 inches (24 mm), providing adequate coverage to prevent oil leakage. The bi-directional helix lip design enhances sealing efficiency by maintaining contact with the shaft in both rotational directions, reducing the risk of contamination ingress. Constructed from nitrile, the seal offers resistance to oil, grease, and typical automotive fluids, contributing to long service life in driveline applications.

Applications and Problem Solving

• Prevents oil leaks in Toyota 4Runner, T100, Tacoma, and Tundra wheel hubs
• Protects axle bearings from dirt, dust, and moisture contamination
• Maintains proper lubrication within the driveline system
• Reduces wear and potential damage to axle components
• Helps avoid costly repairs related to seal failure or leakage

Installation Notes and Tips

When installing the National 710574 wheel seal, ensure the shaft and housing bore are clean and free of debris. Lubricate the seal lip lightly with compatible grease or oil to reduce initial wear during startup. Press the seal evenly into the housing bore to avoid distortion or damage to the sealing lip. Verify the seal orientation matches the bi-directional lip design for optimal performance. Proper installation will help maintain the seal’s integrity and extend the service life of the axle assembly.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 710574 part number is part of the 710500 series, known for consistent quality in driveline sealing applications. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.